adj. [俚]喝醉的
v. 背叛（rat的过去式）

Rat \Rat\, v. i. [imp. & p. p. {Ratted}; p. pr. & vb. n.
{Ratting}.]
1. In English politics, to desert one's party from interested
motives; to forsake one's associates for one's own
advantage; in the trades, to work for less wages, or on
other conditions, than those established by a trades
union.

Coleridge . . . incurred the reproach of having
ratted, solely by his inability to follow the
friends of his early days. --De Quincey.

2. To catch or kill rats.

2. To be an informer (against an associate); to inform (on an
associate); to squeal; -- used commonly in the phrase to
rat on.
[PJC]