A term originating from the popular Disney game Club Penguin, used as a replacement for sexual chat so as to not get banned or reported.
gurl: hey boi
boi: hey gurl come to my igloo
gurl: k
boi: get comfortable
gurl: k
boi: "Pencil goes in"
gurl: mm
boi: lets play mancala
girl: k
by Pencilgoesin6969 January 22, 2016
Get the pencil goes in mug.