Any lachrymatory, non-lethal chemical compound that causes the eyes to sting and water and/or irritates the respiratory system, mostly used for controlling crowds during riots or as self-defense.

To use tear gas.

(chiefly water sports) To dunk into the sea or another body of water / Alternative spelling of teabag

Damage or depreciation resulting from ordinary use (normally as something excluded from a guarantee or warranty of quality, or as justifying a write-down in a set of accounts).

(idiomatic, hyperbolic) Something very valuable or priceless.

Based on precise facts, which, however, may be contrary to common misbelief or to a traditional name. / Based on formal (de jure) arguments, which, however, may be misleading.

Alternative form of don't teach your grandmother how to suck eggs

Alternative form of don't teach your grandmother how to suck eggs

It is impossible to change people's habits, traits, or mindset.

(idiomatic, chiefly in the negative) To tell an expert how to do things.