(idiomatic) To an excessive degree, oftentimes with little to no regard to future consequences; desperately; recklessly or wantonly; frantically; very quickly or very much.

Initialism of identified flying object.

(informal) Speculation as to what might have happened if something else had happened earlier.

simple past tense of if it isn't

Observes, with some surprise, that a specified thing or person is present.

Alternative form of damned if one does and damned if one doesn't

Implementation Force (IFOR), a NATO-led multinational peacekeeping force in Bosnia and Herzegovina in the mid-1990s

(obsolete) Contraction of if it.

(vulgar, potentially offensive) Once someone has grown pubic hair or started puberty, they are old enough for sexual intercourse.

Alternative form of if there's grass on the pitch, play ball