To push a pawn too far, so that it becomes vulnerable to the opponent's attacks.
To expand or extend to an excessive degree, especially to do so beyond a safe limit.
To apply (a term) to too many referents, by overextension.
Synonym of peter (“originally (mining), of a vein of ore: to be depleted of ore; now (generally), to diminish to nothing; to dwindle, to trail off”)