The difference between Hang about and Tarry

When used as verbs, hang about means to stay, linger or loiter, whereas tarry means to delay.

Tarry is also noun with the meaning: a sojourn.

Tarry is also adjective with the meaning: resembling tar.

check bellow for the other definitions of Hang about and Tarry

Hang about as a verb (informal):

To stay, linger or loiter.

Examples:

"If you hang about after the show, you can meet the cast."
Hang about as a verb (informal):

To spend time or be friends (especially to hang about with someone).

Examples:

"My daughter likes to hang about with older kids after school."

Tarry as a verb (intransitive, dated):

To delay; to be late or tardy in beginning or doing anything.

Examples:

"It is true that the Messiah will come, though he may tarry''. ([http://en.wikipedia.org/wiki/Christopher_Hitchens Hitchens] quoting translated [[Maimonides]])"
Tarry as a verb (intransitive, dated):

To linger in expectation of something or until something is done or happens.
Tarry as a verb (intransitive, dated):

To abide, stay or wait somewhere, especially if longer than planned.
Tarry as a verb (intransitive, dated):

To stay somewhere temporarily; to sojourn.
Tarry as a verb (transitive, dated):

To wait for; to stay or stop for; to allow to linger.