I think you mean "Happy Trail"? That is an affectionate term referring to a furry trail running to either genitalia or butt crack.
A prehensile tail.
The tail of a comet is made up of dust and gas. The dust tail is composed of particles that reflect sunlight, while the gas tail is made up of ionized gas that is pushed away from the comet by the solar wind.
The tail of a comet is shaped by the solar wind, which pushes the gas and dust particles emitted from the comet's nucleus away from the Sun. The particles are ionized by sunlight and are then affected by the Sun's magnetic field, forming the distinctive shimmering tail.
Tail of the Sun happened in 1996.
A monkey's tail acts as a counterbalance when they perform tight lateral turns. Some monkeys use their tail as a third arm, hanging from branches by the tail.
When a cat is happy, it usually purrs or sways its tail.
when it wags its tail, it means its happy, and when its tail is still it means its bored, but when its tail is in between its legs it means its mad.
When its wagging its tail
It's tail.
Happy is that blue flying cat, who's friends with nautsu
A dog waggles its tail when its playing and exited
it will wag its tail or lick you
they usually wave their tail
They wag their tail and look very energetic, but they usually are happy anyways.
Happy's partner is 'dragon slayer' mage Natsu Dragneel.
It usally wags its tail
Ears will be up and tail will be wagging