(idiomatic, slang) Not a big deal, not something to worry about.

(US, chiefly Southern US) Any biting midge (family Ceratopogonidae), small flies (1–4 mm long); sometimes the species Leptoconops torrens in particular.

Clipping of there's no time like the present.

Alternative form of no, thanks

Used on signs to indicate that entry into the area where the sign is displayed is forbidden.

(of airspace) In which aircraft are forbidden to fly. / (of people) Who are forbidden to board an aircraft.

Not functioning properly. / Of a place, not to be entered.

Alternative form of no go

(cricket) The result of a one-day match in which a side fails to complete their innings, or to bat the minimum number of overs, because of bad weather.

(Australia, business, law) A form of limited liability that may be used by mining companies, under which the shareholders may pay a company debt by surrendering shares in lieu of money.