What is "estopping"

Estop \Es*top"\, v. t. [imp. & p. p. Estophed; p. pr. & vb. n. Estopping.] [OF. estoper to stop, plug, close, F. ['e]touper, LL. stuppare to close with tow, obstruct, fr. L. stuppa tow, oakum, cf. Gr. sty`pph. Cf. Stop.] (Law) To impede or bar by estoppel.

A party will be estopped by his admissions, where his intent is to influence another, or derive an advantage to himself.
--Abbott.

vb. (present participle of estop English)

See estop