Home / Nicotine Vape Juice and Salts / MBV (Micro Brew Vapor) / MBV – Grumpy Old Bastard 3MG 100mL MBV – Grumpy Old Bastard 3MG 100mL MBV – Grumpy Old Bastard 3MG 100mL A rich and decadent butterscotch caramel cream. To those who have experienced Grumpy; Arguably the best E-liquid flavor in America! Made in small batches with custom extractions. Categories: MBV (Micro Brew Vapor), Nicotine Vape Juice and Salts Product ID: 15929 Check out our other products Keep It 100 Synthetic – FTC 3MG 100mL (OG Krunch) Pacha Mama Synthetic – Fuji Apple Strawberry Nectarine 3MG 60mL Coastal Clouds Salt – Apple Peach Strawberry 50MG 30mL Czar Nicotine – 0.9mL Concentrated Nic Solution 360mg Keep It 100 Synthetic – B.A.L 3MG 100mL (Berry Au Lait)