(interrogative) What ever; emphatic form of 'what'. / Regardless of the ... that; for any ... that. / Any ... that; of no matter what type or kind that. / Any; of no matter what type or kind.

(interrogative) What ever; emphasised form of 'what', used to ask which thing, event, circumstance, etc. / Regardless of anything that. / (fused relative) Anything that; all that.

(with negative) At all; in any way; whatsoever. / (interrogative) In what way; to what extent.

(colloquial) A holophrastic expression used to dismiss something that the speaker doesn't care about, doesn't think important, or doesn't want to consider or discuss any further.

(colloquial) Unexceptional or unimportant; blah.

(colloquial) Something whose exact kind or nature is unimportant; a thingy.

plural of whatever

(slang) Synonym of whatever

Apathetic meaninglessness; a state in which something does not matter or is not cared about.

Contraction of whatever is. / Contraction of whatever has. / (rarer, nonstandard) Contraction of whatever does.