A soft, feminine giggling sound, often used by women or girls to express mild amusement or coyness. Onomatopoeic/mimetic.
She giggled, 'tee-hee.'
おほほ is an exaggerated, haughty upper-class laugh, while うふふ is a softer, subdued feminine laugh often hinting at mischief or amusement.
Standard hiragana spelling for this feminine giggling interjection.
Katakana variant, often used for emphasis or in manga.
Onomatopoeic/mimetic word imitating a soft, feminine giggle. The exact origin is uncertain.