No-coiner
A no-coiner is someone who has no cryptocurrency in his or her investment portfolio and firmly believes that cryptocurrency in general will fail.
Non-custodial
Usually referring to the storage of keys, in relation to wallets or exchanges, a non-custodial setup is one in which private keys are held by the user directly.
Nonce
When a transaction is hashed by a miner, an arbitrary number meant to be used only once is generated, called a nonce.
N