niffy

As a noun spiffy

is a spring-wire collar stay, worn by men.

As an adjective niffy is

(colloquial) having a bad smell.

As an adjective niffy

is (colloquial) having a bad smell.

As a noun neffy is

.

As adjectives the difference between sniffy and niffy

is that sniffy is disdainful; haughty while niffy is (colloquial) having a bad smell.

As adjectives the difference between niffy and nifty

is that niffy is (colloquial) having a bad smell while nifty is good, smart; a general term for anything that is good, useful or beneficial.

As adjectives the difference between riffy and niffy

is that riffy is (music) characterized by a lot of riffs (guitar riffs) while niffy is (colloquial) having a bad smell.

As an adjective niffy

is (colloquial) having a bad smell.

As a noun giffy is

(brief moment).

As adjectives the difference between niffy and iffy

is that niffy is having a bad smell while iffy is of dubious authenticity, legitimacy or legality.

As an adjective niffy

is (colloquial) having a bad smell.

As a noun biffy is

(us) a toilet.

As adjectives the difference between miffy and niffy

is that miffy is easily irritated while niffy is (colloquial) having a bad smell.

In colloquial terms the difference between jiffy and niffy

is that jiffy is a very short, unspecified length of time while niffy is having a bad smell.

As a noun jiffy

is a very short, unspecified length of time.

As an adjective niffy is

having a bad smell.