Difficult to bend; rigid. Not moving or operating easily or freely; resistant: a stiff hinge. Lacking ease or comfort of movement; not limber: a stiff neck. Drawn tightly; taut. Rigidly formal. Lacking ease or grace. Not liquid, loose, or fluid; thick: stiff dough. Firm, as in purpose; resolute. Having a strong, swift, steady force or movement: a stiff current; a stiff breeze. Potent or strong: a stiff drink. Difficult, laborious, or arduous: a stiff hike; a stiff examination. Difficult to comprehend or accept; harsh or severe: a stiff penalty. Excessively high: a stiff price. Nautical Not heeling over much in spite of great wind or the press of the sail. In a stiff manner: frozen stiff. To a complete extent; totally: bored stiff. Slang A corpse. Slang A person regarded as constrained, priggish, or overly formal. Slang A drunk. Slang A person: a lucky stiff; just an ordinary working stiff. Slang A hobo; a tramp. Slang A person who tips poorly. Slang To tip (someone) inadequately or not at all, as for a service rendered: paid the dinner check but stiffed the waiter. To cheat (someone) of something owed: My roommate stiffed me out of last month's rent. To fail to give or supply (something expected or promised).