Boom bap — the 90s East-Coast hip-hop drum pattern (DJ Premier, Pete Rock, early Dilla) named for its two sounds: the boom of a sampled kick and the bap of a hard, dry snare on 2 and 4. The kick plays beat 1, the "a" of 2 and the "and" of 3 in the first bar, then a busier 1, "a" of 1, "and" of 3, "e" of 4 in the second; the hat ticks straight eighths. Nothing is swung — the grid is straight sixteenths, which is what separates it from dilla-swung-16ths.
The harmony is a looped two-bar sample: a minor seventh held and re-struck on the "and" of 2 and the "and" of 3, the bass on the same rhythm an octave down — a 3-3-2 shape lifted from the soul records the samples came from.
Listen for the snare: loudest thing in the mix and exactly on the beat, which makes the kick's off-beat placements sound heavy rather than busy. Practice: drums first with the rest muted; then play the chords with the "and of 2" push and sustain through the snare.