жарить

To rail, to plough, to shag; to fry/roast (literal). Colloquial verb that is heavily used in modern slang as a vivid, aggressive metaphor for energetic or passionate sexual intercourse. While its literal meaning is simply to cook or fry food, its sexual connotation frames the act as something intense, hot, or exhausting (e.g., они жарились всю ночь — “they were railling each other all night”). It is typically used from a male perspective or to describe a raw, unrefined physical act.

Там, никого не стесняясь, Мишка жарил Сашу так, что ее заброшенные ноги стучали в стенку в пионерском ритме.

There, without the slightest embarrassment before anyone, Mikhail was banging Alexandra, her feet rhythmically banging against the wall.

(Ворчун @ sextalk.ru, 12/2009)

See рыбку жарить.

To screw, have sex with. Used to describe intense or casual sexual activity (они там в комнате вовсю жарятся — “they are back there in the room boning like crazy”).

Сейчас трахаться, раньше жариться — а как еще раньше это называлось?

Now it’s fucking, before it was screwing — and what was it called even earlier?

(Андрей Шеломенцев @ google.ru, 06/2008)