The function is neither a drill nor a Christmas tree, but similar to how it happens to look (≈) like a Christmas tree, it also happens to look like a drill. This is what I wanted to point out. It’s a multipurpose function.
It is also not a pipe
Cici n'est pas un arbre de Noël tabarnak
Haha, oh I miss the Quebecois. Appropriation of Catholic vernacular make for the best profanities.
block_dagger was making a pun based on the sense of drill as a training exercise. A similar joke went over the heads of nearly everyone on a recent episode of Taskmaster: