Initialism of occupational health and safety.

a expression of amazement

An expression of delight or joy. / An expression of dismay, resignation, frustration, or annoyance (sarcastic).

An exclamation of error, concern, or awareness of a problem.

Alternative form of uh-oh

Alternative form of oh my God

(idiomatic) An expression of mild disappointment or resignation; too bad, it's a pity.

(informal, slang) Used to indicate agreement, often sarcastically. / (informal, slang) Used to introduce a refutation, sometimes sarcastically. / (informal, slang) An exclamation of excitement or joy

Used to express disappointment or annoyance. / Used to express excitement or enthusiasm.

An expression of dismay, concern, worry or disapproval.