v. Very similar to the term motorboat, but instead of moving one's head side to side, you use one hand on the outside of each boob, alternating pushing them back and forth against one's face while it stays still and making a vigorous, lip-vibrating "brrr" sound.
John - "Man, Mary's tits were so nice, I just Paddleboat (ed) the shit out of them!"
Similar to motorboating, a successful paddle boat is performed by inserting your index finger into the exposedcleavage of a girl and wiggling it back and forth.
I got drunk and his girl wouldn't let me motorboat her so I paddleboated her.
Similar to 'motorboating', a person rapidly jostles another's chest area with their face. However, in cases where breasts are too small, unsavory, or the target of the 'boating' is a male with defined pecs or gross 'moobs', this is met with the urge to throw up, cry, or play in traffic.
"I went to motorboat Joe's girlfriend but I ended up paddleboating her non-existant tits"
"I think Greg was drunk when he decided to paddleboat fat Steve"
"Chris's pecs were so hard I felt like I was paddleboating two boulders"