In Esperanto, the word for "pants" (US English) or "trousers" (UK English) is the singular noun pantalono. Thus pantalonoj is multiple pairs of pants.
ŝtrumpo stocking (up to the knee)
ŝtrumpeto sock (up to the calf)
The suffix -et means "small,", so a sock is a small stocking (ŝtrumpeto)!
Mojosa (cool) is the most popular slang term in Esperanto. It originates from modern-jun-stila (modern-young-stylish). Reading out the first letter of each word gives Mo-Jo-So, which becomes mojoso (coolness). The adjective form is mojosa.