(derogatory) Of a supposedly scientific argument or explanation: unable to be meaningfully discussed because it is based on fundamentally invalid reasoning or speculative premises that cannot be proven or falsified.

The first note of a diatonic scale; the keynote, the tonic.

A notation used in music that increases the duration of the basic note by half of its original value.

(motorcycling) When choosing clothing for riding a motorcycle, priority should be given to protective gear that helps one survive an accident.

If (something) were not (or had not been) there; in the absence of (something); without.

(Australia, UK, vulgar) Used to indicate one has serious business to pursue and should not be wasting time.

be carefree

plural of nothing-up-my-sleeve number

(cryptography) A number which, by its construction, is above suspicion of having hidden properties; used in creating cryptographic functions such as hashes and ciphers.

(archaic) To be executed by hanging.