What is the meaning of Flo?

boy

to breathe, blow

An arrow (projectile weapon shot from a bow), especially one used with a longbow.

Anything felt to have a (metaphorically) piercing effect.

high tide

a horizontal layer

a rain shower

(non-standard since 1938) past tense of flå

alternative form of flad (“breath ”)

fluorine

Source: wiktionary.org