WordNet sense 1 (an informal term for a father; probably derived from baby talk):

dad, daddy, pa, papa, dada, pappa

WordNet sense 2 (a sweet drink containing carbonated water and flavoring):

soda, tonic, soda water, soda pop

WordNet sense 3 (a sharp explosive sound as from a gunshot or drawing a cork):

popping

WordNet sense 4 (music of general appeal to teenagers; a bland watered-down version of rock'n'roll with more rhythm and harmony and an emphasis on romantic love):

pop music

WordNet sense 5 (appear suddenly or unexpectedly):

crop up, pop up

WordNet sense 6 (bulge outward):

bulge, protrude, start, pop out, come out, bug out, bulge out

WordNet sense 7 (drink down entirely):

down, kill, toss off, belt down, bolt down, drink down, pour down

WordNet sense 8 ((of music or art) new and of general appeal (especially among young people)):

popular

WordNet sense 9 (not classical):

nonclassical