To escape; to free oneself.

(rugby, dated) Ruck.

(historical) A con game played with a chain, belt or string that is laid down to form two open loops. The mark places a finger or stick in one of the loops to try and secure (fast) the chain when it gets lifted, but either loop can fast or fail to fast (loose) the chain around the mark's finger/stick depending on where the con artist decides to lift the chain.

(grammar) A syntactic construction which uses the past participle, inflected in the ablative case, without an auxiliary verb yet not as an adjective, but silently supposing a verb to depend upon.

A sexually promiscuous woman; a prostitute.

Coins of little value kept in one's pocket or bag. / (idiomatic) A sum of money considered small or insignificant.

Indiscreet.

Third-person singular simple present indicative form of let loose

simple past tense and past participle of turn loose

Third-person singular simple present indicative form of break loose