Unstable by being overloaded at the top.

Roget 28: unequal, uneven, disparate, partial; unbalanced, overbalanced; top-heavy, lopsided, biased, skewed; disquiparant^†.   

Roget 665: in danger etc. n.; endangered etc. v.; fraught with danger; dangerous, hazardous, perilous, parlous, periculous^†; unsafe, unprotected etc. (safe, protect) etc. 664; insecure.    untrustworthy; built upon.   sand, on a sandy basis; wildcat.    defenseless, fenceless, guardless^†, harborless; unshielded; vulnerable, expugnable^†, exposed; open to etc. (liable) 177.    aux abois [Fr.], at bay; on the wrong side of the wall, on a lee shore, on the rocks.    at stake, in question; precarious, critical, ticklish; slippery, slippy; hanging by a thread etc. v.; with a halter round one's neck; between the hammer and the anvil, between Scylla and Charybdis, between a rock and a hard place, between the devil and the deep blue sea, between two fires; on the edge of a precipice, on the brink of a precipice, on the verge of a precipice, on the edge of a volcano; in the lion's den, on slippery ground, under fire; not out of the wood.    unwarned, unadmonished, unadvised, unprepared etc. 674; off one's guard etc. (inexpectant) 508^†.    tottering; unstable, unsteady; shaky, top-heavy, tumbledown, ramshackle, crumbling, waterlogged; helpless, guideless^†; in a bad way; reduced to the last extremity, at the last extremity; trembling in the balance; nodding to its fall etc. (destruction) 162.    threatening etc. 909; ominous, illomened; alarming etc. (fear) 860; explosive.    adventurous etc. (rash) 863, (bold) 861.    ... show more

Roget 959: drunk, tipsy; intoxicated; inebrious^†, inebriate, inebriated; in one's cups; in a state of intoxication etc. n.; temulent^†, temulentive^†; bombed, smashed; fuddled, mellow, cut, boozy, fou^†, fresh, merry, elevated; flustered, disguised, groggy, beery; top-heavy; potvaliant^†, glorious; potulent^†; squiffy [Slang]; overcome, overtaken; whittled, screwed [Slang], tight, primed, corned, raddled^†, sewed up [Slang], lushy [Slang], nappy^†, muddled, muzzy^†, obfuscated, maudlin; crapulous^†, dead drunk.    woozy [slightly drunk], buzzed, flush, flushed.    inter pocula^†; in liquor, the worse for liquor; having had a drop too much, half seas over, three sheets in the wind, three sheets to the wind; under the table.    drunk as a lord, drunk as a skunk, drunk as a piper, drunk as a fiddler, drunk as Chloe, drunk as an owl, drunk as David's sow, drunk as a wheelbarrow.    drunken, bibacious^†, sottish; given to drink, addicted to drink, addicted to the bottle; toping etc. v.. ... show more