break the plane

in american football, it means that the ball broke the imaginary plane extending upward from the goal line. signifies that a touchdown occurred.

in bed, it means that the tip of the p-n-s entered the v-g-n- or -n-s to some extent. this is typically considered the point at which s-xual intercourse has occurred.
sam: “come on, baby, let me beat it up.”
christina: “no, i’m a good girl. i don’t do that kind of thing with guys unless i’m in a serious relationship.”
sam: “just the tip, just for a minute, just to see how it feels?”
christina: “ok, sure, but no more than that…and you can’t tell anyone.”
sam: “of course.”
(inserts tip)
(10 seconds later)
sam: “oh, oh, oh!”
christina: “oh no you didn’t just…”
sam: “yes! gotta go.”
(sam hurriedly dresses and runs outside to roommates who are playing xbox and smoking the reefer)
sam: “hey guys, guess what just happened!”
rasheed: “did you chuck it in her?”
sam: “h-ll yeah, bro! skeet skeet! time to put another notch in the bedpost.”
(high-fives all around)
(christina comes out)
christina: “um, no you didn’t. that didn’t even count.”
sam: “let’s take a look at the instant replay, shall we?” (pulls out tape)
christina: “you videotaped it? you -sshole!”
(video playing)
rasheed: “did he break the plane? yes he did! touchdown! count the chuck!”
(high-fives all around)
sam: “so…ready for round 2?”
christina: “dream on. compared to you, a one minute man sounds like a good thing. you’re never going to hit it again. oh and all the girls in town will know about your 3-inch needle d-ck before long. i bet you pee on your nuts. later, chump.”