What is the meaning of Flo?

boy

to breathe, blow

An arrow, especially one used with a long bow (projectile weapon emitted from a bow)

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