Kylie Jenner is ''bored'' of rumours her she's had her lips surgically enhanced.

The 17-year-old reality TV star, who first sparked speculation she'd had injections to boost the size of her pout in April after showing off noticeably fuller lips on Instagram, thinks there are more important things to talk about and is eager to move on.

The 'Keeping Up with the Kardashians' star hit back at her critics on Twitter on Monday night (27.10.14), writing: ''How long are we gonna talk about this lip thing lmao. Let's get a our lives together guys and talk about some important s**t. Just talk about something new at least. I'm bored (sic).''

Kylie, who is reportedly dating rapper Tyga, 24, previously admitted she was ''insulted'' by allegations she's had cosmetic surgery.

She tweeted: ''These plastic surgery rumours hurt my feelings to be honest and are kinda insulting. Just in case anyone forgot.. I'm 16.''

The brunette beauty's older half-sister Kim Kardashian West, 34, has also been the subject of nose and lip job rumours in the past, but previously said: ''I guess it's a compliment to my makeup artist that he does such a good job contouring my nose that it appears smaller.''