He and she shagged each other in her parents house on the living room floor while her parent;'s were sleeping. He was a good shagger,, or so the story goes, all evidence gone now, because the mum vacuumed the carpetthe following morning.
A nod of recognition between two shaggers. Much like the common "runner's nod", it is a simple nod of encouragement to a fellow shagger, tacitly telling them to "keep up the good work!".
"So Declan now had a girlfriend, and Shagger's Nod began to replace 'hello' as we passed each other in the library. Finally, he was part of the club."