This is a comedy movie. The word pineapple express id the type off weed (marijuana) which basically gets them into the mess. Great movie. The weed is particularly strong and rare which is why its so funny.
Saul: This is like if that Blue Oyster shit met that Afghan Kush I had - and they had a baby. And then, meanwhile, that crazy Northern Light stuff I had and the Super Red Espresso Snowflake met and had a baby. And by some miracle, those two babies met and fucked - that baby would be the mother of all weed! PINEAPPLE EXPRESS!
Dale Denton: smells the marijuana Wow. This is the product of baby fucking.
Is the sexual act and/or process performed by males, which consist of eating sweet fruits such as pineapples to generate sweet tasting semen or male ejaculate primarily for the receiving sexual partner to taste or eat after a facial
"Dude last night I gave her a taste of the pineapple express. She noticed i had eaten some prettysweet Dole pineapples."