A girl miming that she has just came everywhere due to an excitable moment. Generally the movement consists of her hands starting near her vagina and waving outward.
Can be used as a exclamation word along with the motions.
- 2 girls listening to a guy play acoustic guitar.
Cassi - "Jesus, Jordan can play that guitar for me anytime. I just smooshed all over the place"
Amanda -"Tell me about it! Smoosh!" (hand movements)