طَوِيلُ النِّجَادِ
A person whose sword-belt is long.
The intended description is tall stature, as a long sword-belt can suggest a tall bearer. This is kināyah: the expression conveys an associated implication while literal interpretation remains possible in the relevant type of usage. It is not required that the particular person actually own a sword-belt.
If another context explicitly made the literal interpretation impossible in a particular utterance, that utterance would need reassessment. The examination trap is to confuse “literal meaning remains possible” with “the literal state must actually obtain.”