A style of hip hop signified by a hard bass drum and snapping snare that is often EQed to the forefront of the beat.
Some examples include the album "Return of the Boom-bap" by Krs-One, the Duck Down record label.
"With a kick, snare, kicks and high hat
Skilled in the trade of that old boom bap" is orginally from A Tribe Called Quest song "We Can Get Down."
The original poster is obviously a new jack attributing it to Apathy, because Tribe is one of the crossover acts that even kids living in the suburbs of Alberta know of.